Eu-Doped KCl storage phosphor for erasable and rewritable optical memory utilizing photostimulated luminescence phenomenon

Nanto, Hidehito; Endo, Fumitaka; Hirai, Yukio; Nasu, Shōichi; Takeuchi, Nozomu

doi:10.1007/bf03254855

Cited by 4 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, ZnS: Eu 2þ nanoparticles usually found their green emission due to Eu 2þ 4f 6 5d 1 -4f 7 transition at about 530 nm. 23,25,26 A violet emission of 420 nm from Eu 2þ could be seen in other hosts 27,28 but not in ZnS. Here, as shown in Figure 2, the emissions of 420 nm, 460 nm, and 520 nm should be related to Eu 2þ doping.…”

Section: Discussionmentioning

confidence: 78%

A violet emission in ZnS:Mn,Eu: Luminescence and applications for radiation detection

Jiang

Liu

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

Articles you may be interested inTunable emission in surface passivated Mn-ZnS nanophosphors and its application for Glucose sensing AIP Advances 2, 012183 (2012); 10.1063/1.3698310Temperature and pressure behavior of the emission bands from Mn-, Cu-, and Eu-doped ZnS nanocrystalsWe prepared manganese and europium co-doped zinc sulfide (ZnS:Mn,Eu) phosphors and used them for radiation detection. In addition to the red fluorescence at 583 nm due to the d-d transition of Mn ions, an intense violet emission at 420 nm is newly observed in ZnS:Mn,Eu phosphors. The emission is related to Eu 2þ doping but only appears at certain Eu 2þ concentrations. It is found that the intensity of the 420 nm violet fluorescence is X-ray does-dependent, while the red fluorescence of 583 nm is not. The ratio of fluorescence intensities at 420 nm and 583 nm has been monitored as a function of X-ray doses that exposed upon the ZnS:Mn,Eu phosphors. Empirical formulas are provided to estimate the doses of applied X-ray irradiation. Finally, possible mechanisms of X-ray irradiation induced fluorescence quenching are discussed. The intense 420 nm emission not only provides a violet light for solid state lighting but also offers a very sensitive method for radiation detection. V C 2014 AIP Publishing LLC. [http://dx.

show abstract

Section: Discussionmentioning

confidence: 78%

A violet emission in ZnS:Mn,Eu: Luminescence and applications for radiation detection

Jiang

Liu

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…The maximum stimulation efficiency occurred at 570 nm, which was subsequently selected as the readout wavelength in studies presented below. These findings are consistent with previously published reports [12,45,46]. Readout loss due to partial depletion of trapped electrons after repeated readings [13].…”

Section: Beam Energy Dependencesupporting

confidence: 94%

“…Figure 5.8 shows the photoluminescence lifetime with dose history up to 5000 Gy did not deviate from its fresh value, approximately 1.2 µs, outside the experimental uncertainty, consistent with previous findings [45]. According to Zheng et al [121], a luminescence time of the order of one microsecond per pixel allows a readout time within a few seconds for a 20×20 cm 2 panel with 0.5×0.5 mm 2 pixels.…”

Section: Psl Emission Spectra With Cumulated Dosesupporting

confidence: 86%

See 1 more Smart Citation

Dosimetric properties and radiation hardness of the storage phosphor europium doped potassium chloride for radiation therapy dosimetry

Driewer¹

View full text Add to dashboard Cite

Multidimensional reusable dosimeters are extremely important for characterizing the complex dose distributions associated with modern radiation therapy techniques, such as intensity modulated radiation therapy (IMRT). In particular, reusability provides medical physicists a degree of confidence in dosimetric measurements through the acquisition of benchmarking datasets and through long-term, repeated use and performance monitoring. Yet a dosimeter that has all of the properties desired for radiation therapy use, such as reusability, high spatial resolution, and water-equivalence, is not currently available. The results of this dissertation demonstrate that the reusable storage phosphor europium doped potassium chloride, KCl:Eu2+, has the potential to significantly advance the state-of-the-art in radiation therapy dosimetry. Prototype chip and panel dosimeters were fabricated according to well-developed materials science processes. Dosimetric properties were studied by reading photostimulated luminescence (PSL) after irradiation with a laboratory optical system. Sensitivity was independent of dose rate and beam energy for commonly used therapy beams. Over-response to low-energy scattered photons was comparable to conventional radiographic film and reduced with lead foils. No significant changes in the PSL process were detected up to 5000 Gy dose history, indicating that the material could be reused up to 2500 times at 2 Gy per use, as in, for example, patient-specific IMRT quality assurance. Investigations of KCl:Eu2+ panel dosimeters show that sub-millimeter spatial resolution is achievable and that micron-scale dosimeters have a water-equivalent dose response with sufficient sensitivity over clinically relevant dose ranges. In conclusion, KCl:Eu2+ is demonstrated to have many desirable properties for radiation therapy dosimetry. This study provides a practical and theoretical knowledge base that advances and supports future KCl:Eu2+ dosimetry research.

show abstract

“…6 The phosphor ceramic disks of 13mm diameter and 1mm thickness were used as samples. The SrS:Eu,Sm phosphor ceramics with different Eu concentrations or with different Sm concentrations were also prepared in order to study the dependence of the PSL characteristics on Eu and Sm concentration A Hg-lamp and ion laser was used as the UV-light and visible-light sources in order to write in the information.…”

Section: Methodsmentioning

confidence: 99%

<title>Advanced optical storage phosphor materials for erasable and rewritable optical memory utilizing photostimulated luminescence</title>

Nanto

Sato

Miyazaki

et al. 1999

Advanced Optical Data Storage: Materials, Systems, and Interfaces to Computers

Self Cite

View full text Add to dashboard Cite

The Boolean logic operations such as OR. AND and NOR are demonstrated using photostimulated luminescence (PSL) phenomenon in the imaging plate (IP) which is made by BaFBr.Eu photostimulable phosphor. The PSL in Eu and Sm codoped SrS (SrS:Eu,Sm) phosphor ceramics is studied in order to develop a smart erasable and rewritable optical memory utilizing PSL phenomenon, because the SrS:Eu,Sm phosphor ceramics which are excited with UV-light or visible light exhibits an intense PSL, compared with that in UV4rradiated IP. Intense PSL with a peak at about 600 nm is observed in SrS:Eu,Sm phosphor ceramics which is stimulated with infrared light after irradiation with u1traviolet(UV) light or visible4ight. The PSL characteristics of SrS:Eu,Sm phosphor ceramics as a photostimulable material for the optical memory are reported.

show abstract

Eu-Doped KCl storage phosphor for erasable and rewritable optical memory utilizing photostimulated luminescence phenomenon

Cited by 4 publications

References 8 publications

A violet emission in ZnS:Mn,Eu: Luminescence and applications for radiation detection

A violet emission in ZnS:Mn,Eu: Luminescence and applications for radiation detection

Dosimetric properties and radiation hardness of the storage phosphor europium doped potassium chloride for radiation therapy dosimetry

<title>Advanced optical storage phosphor materials for erasable and rewritable optical memory utilizing photostimulated luminescence</title>

Contact Info

Product

Resources

About